Setball Ball Sector Valves

The NAF Setball valve is a highly versatile and cost-effective solution designed to deliver unmatched performance
in a range of general service and erosive applications, such as fibers and slurries.
The Setball valve is a V-port ball sector valve that combines a compact design with excellent equal percentage flow characteristics and
high flow capacity. It is designed primarily for modulating control applications; however, it can also be used effectively for
shut-off service.
The NAF Setball valve is engineered to increase process yield and plant uptime through durable functionality and higher reliability.
Its features include:
• A ball sector with a V-port, resulting in excellent control characteristics in combination with high flow capacity and
rangeability
• A one-piece, leak-proof valve body, flanged or wafer design, that provides a cost-effective method for minimizing leak paths
• Enhanced product integrity through a V-ring stem seal packing and an optional spring loading that provides safe operation
within a wide temperature coverage
• Dual low-friction bearings facilitate smooth operation and allow the use of a small actuator
• A stem with a splined transmission to the ball sector that provides optimum control performance
• Direct-actuator mounting capabilities of the NAF TurnexTM actuator that provide a high-performance, vibration-resistant,
compact valve package
• Spring-loaded metal seats with a rigid welded overlay of Alloy 6 that provide higher leakage resistance over extended periods
or alternatively, metal-supported, reinforced PTFE seats for optimum tightness
• Special low-flow trims for the smallest size
• Unique Z-trimTM option that minimizes the risks of cavitation and aerodynamic noise, resulting in a better working
environment and lower maintenance costs
• Reduced downtime through an easy-to-service arrangement, which allows for simplified replacement of the seat and seat
seal without the need for removing the ball sector and stem
CE-marked according to Pressure Equipment Directive (PED 2014/68/EU) module H, category III.

Technical specifications for standard design

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